General Information Regarding the CE Marking

General Information

Regarding the

CE Marking

General Information Regarding the CE Marking

All ROHDE & SCHWARZ measuring instruments comply

with the regulations of the EMC directive. The ROHDE &

SCHWARZ conformity evaluation is based on applicable

professional and product standards. In cases where

multiple limit values can be used, ROHDE & SCHWARZ

will apply the stricter standard of the two. With regard to

interference emission, the limit values for businesses and

commercial operations including the small business sector

are applied (Class 1B). For the susceptibility to interference

emissions, the applicable limit values for the industrial sec-

tor are used. The signal and data cables that must be con-

nected to the device during operation will necessarily affect

the compliance with the acceptance limits to some extent.

However, the cables used for this purpose will vary, depend-

ing on the application. For operation of the device, the follow-

ing information and conditions should therefore be observed

with regard to interference emission and susceptibility:

1. Data Cables

All connections between measuring instruments or their

interfaces and external devices (printers, computers, etc.)

must always be implemented with adequately shielded

cables. Unless the user manual species a shorter maximum

cable length, the data cable (input/output, signal/control) may

not exceed a total length of 3 m, and may not be located

outdoors. If the device interface allows the connection of

more than one cable, only one may be connected at a time.

Data cables in general should always be double-shielded

cable. For the IEEE bus cable, the double-shielded cable

HZ72 is recommended and can be ordered from ROHDE &

SCHWARZ.

2. Signal Cables

Signal cables used for signal transmission between the

measurement point and the measuring device should gener-

ally be kept as short as possible. Unless a shorter maximum

cable length is specied, the signal cables (input/output,

signal/control) may not exceed a total length of 1 m, and may

not be located outdoors. All signal cables must be shielded

(RG58/U coaxial cable). Care must be taken to achieve a

proper ground connection. For signal generators, double-

shielded coaxial cables (RG223/U, RG214/U) must always be

used.

3. Impact on the Equipment

In the presence of strong high-frequency electric or

magnetic elds, unwanted signal components may enter

the equipment, despite careful setup of the connected

cables and lines. With ROHDE & SCHWARZ measuring

instruments, this will neither be destructive nor lead to the

shutdown of the equipment. As a result of such external

conditions, the displayed values and readings may show

minor deviations with respect to the applicable instrument

specications in individual cases.